As my old passport was full, I had to get a new one. My Vietnam visa (a 5-year visa) is in my old passport. As I cannot transfer that visa, and would have to give up my passport for 1 month to get a new one, I tried to find out if I could travel back to Vietnam with both the old and new passport. I will just not be able to not have my passport for a month; at least not any time soon. What can I do? Regards,